Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
MCG&LS Science Olympiad Rockhound Class
Paul Randazzo
Class outline created by Richard Brzozowski &
Ron Rolfe
first uploaded 2015
Formation of our Solar System
Goldilocks Zone
Earth’s interior
How do we know?
Deepest mine in the Crust•Tau Tona Gold mine•South Africa•2.4 Miles deep•Rock faces 140 Degrees F
Plate Tectonics
Plate Map
•There are Mountains and Volcanoes on the Red Convergent boundaries•There are Trenches and new crust formation on the Blue Divergent boundaries
Volcanoes
Magma TypesGranitic=Felsic Andesitic=Intermediate Basaltic=Mafic
•Quartz -always•Light Colored Feldspars •Muscovite Mica -usually
•Dark Colored Feldspars•Biotite Mica•Very little or no Quartz
•Has some features of both types
Intrusive and Extrusive Rocks
Visible Crystals in Igneous Rocks
The amount and size of crystals tell how quickly it cooled
•When a rock has Large crystals it cooled Slowly•This texture is called Phaneritic
•When a rock has Small crystals it cooled Quickly•This texture is called Aphanitic
Bubbles in Extrusive Rocks• The amount and size
of holes in a rock tell about it’s consistency when it was liquid rock, and how much gas was trapped
• When a rock has bubbles it’s texture is called Vesicular
Igneous Rocks
• Basalt• Scoria• Pumice• Obsidian• Granite
Special for 2015• Diorite• Gabbro• Rhyolite
Basalt 6B• Extrusive• Mafic• No to few Vesicles• Aphanitic texture
Scoria 10B• Extrusive• Mafic• Many Vesicles• Aphanitic texture
Pumice 9B• Extrusive• Felsic• Many Vesicles• Aphanitic texture
Obsidian 8B• Extrusive• Intermediate-Felsic• Few-No Vesicles• Aphanitic Glassy
texture
Granite 7B• Intrusive• Felsic• No Vesicles• Phaneritic texture
Diorite• Intrusive• Intermediate felsic/
mafic• No Vesicles• Phaneritic texture
Gabbro• Intrusive• Mafic• No Vesicles• Phaneritic texture
Rhyolite• Extrusive• Felsic• No to few Vesicles• Aphanitic texture
(Mostly)